JPS5950015B2 - Combustion control device for vaporizing combustor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion control device for a vaporizing combustor.
The purpose is to improve economic efficiency.

Generally, a vaporizing type combustor has a heater built into the combustion chamber that vaporizes liquid fuel, and is energized to generate heat as soon as the heater starts operating.

Therefore, when starting to use the fuel, there is a problem that combustion cannot be started unless the heater vaporizes the liquid fuel.

For this reason, when use is temporarily interrupted, combustion is continued without turning off the operation switch, wasting fuel, which is often an uneconomical practice.

In addition, as is the case with combustion devices in general, there is a problem in that if the control circuit automatically returns and starts combustion after a power outage, there is a risk of explosive combustion, which is extremely dangerous.

The present invention eliminates these conventional drawbacks, and embodiments thereof will be described below with reference to the drawings.

FIG. 1 shows a control circuit when used as a simple combustor, that is, a burner for a cooker, etc. 1 is a power source, 2 is a heater connected to this power source 1 via a normally open preheating switch 3,
Although not shown, it is built into the combustion section and is designed to vaporize liquid fuel.

4 is a relay connected in parallel to the heater 2, and has a normally open self-holding relay contact 4a connected in parallel with the preheating switch 3, and a normally open auxiliary relay contact 4b connecting the heater 2 to the power source 1. .

Reference numeral 5 designates a changeover switch for selectively connecting the relay 4 and heater 2 to the power source 1, which also serves as a power switch, and is normally connected to the heater 2 side.

Note that 6 in the figure is a fuel solenoid valve. In the above configuration, when the changeover switch 5 that also serves as a power source is connected to the relay 4 side, that is, when the preheating switch 3 is turned on, electricity is supplied to the fuel solenoid valve 6 and the relay 4 via the changeover switch 5 and the preheating switch 3. flow, its relay contacts 4a, 4b
closes.

The relay 4 is self-held by closing the relay contact 4a, and even if the preheating switch 3 is turned off, energization is continued and the fuel solenoid valve 6 is also held open.

On the other hand, by closing the other auxiliary relay contact 4b, electricity is started to be supplied to the heater 2, preheating is started, and combustion is started.

Here, if the user wants to temporarily interrupt the combustion, all he has to do is switch the selector switch 5 to the heater 2 side and close the preheating switch 3. This allows the fuel solenoid valve 6 connected in parallel to the relay 4 to be connected. Electricity is cut off, this closes, and combustion is stopped.

At the same time, the power to relay 4 is cut off, and relay contact 4
a and 4b are opened, but the changeover switch 5 and
Electricity continues to be supplied via the preheating switch 3.

Therefore, when the user switches the selector switch 5 to the relay 4 side to start operation again, fuel vaporization occurs instantly and combustion starts.

In addition, if a power outage etc. occurs during the combustion, relay contact 4
a and 4b are opened, power to the heater 2 is cut off, vaporization of the fuel is stopped, and therefore combustion is stopped.

Figure 2 shows the control circuit when used as a hot air heater.
A combustion fan 7, a blower fan 8, an igniter 9 (omitted in FIG. 1), etc. are connected in parallel with the relay 4 shown in FIG. However, it is the same as the previous one.

As described above, according to the present invention, by using a relay contact and a changeover switch, it is possible to energize only the heater to perform only preheating, and combustion can be restarted instantaneously after combustion is interrupted.

In other words, there is no need to wait for a certain period of time before starting combustion.

Therefore, when combustion is temporarily interrupted, it is sufficient to perform only preheating without continuing combustion as in the conventional case, and the economical efficiency is dramatically improved, such as by eliminating wasteful use of fuel.

In addition, after a power outage during combustion, combustion will not start unless the preheating switch is turned on, so there is no risk of explosive combustion, etc., which has great effects.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are circuit diagrams of a combustion control device in an embodiment of the present invention, respectively. 1... Power supply, 2... Heater, 3... Preheating switch, 4... Relay, 4a... Relay contact, 4b...
Auxiliary relay contact, 5... Selector switch, 6... Fuel solenoid valve.

Claims (1)

[Claims] 1 Connect a fuel solenoid valve and a relay in parallel, connect one side of a heater in series to one connection between the solenoid valve and the relay, and connect one side of a power source in series to the above-mentioned connection through a preheating switch. , and a changeover switch is provided for selectively connecting the fuel solenoid valve and the other connection part of the relay, and the other side of the heater to the other side of the power supply, and a first connection part of the relay is provided in parallel with the preheating switch. A combustion control device for a vaporizing combustor, in which a relay contact is connected, and a second relay contact of the relay is connected to short-circuit the other side of the heater and the other side of the power source.